I think murder drones MAKE the zombie drones.
This theory mainly comes from near the end of episode one when J uses that E.M.P. attack, what else could that have done?
Shortly after that scene we see uzi with the absolute solver symbol
So just think, how many other workers were infected with it and don't know it yet? Exposure to murder drones could just accelerate the process.
I wouldn't be surprised if in episode 5 we see a few more workers suddenly have absolute solver abilities, they were around N and V a lot in episode 4
